Moment distributions around holes in symmetric composite laminates subjected to bending moments

Prasad, C. B.; Shuart, Mark J.

doi:10.2514/3.25133

Cited by 11 publications

(2 citation statements)

References 14 publications

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“…The case of a circular hole in an orthotropic plate under bending was studied by Lekhnitskii (1968), where k b is given as: Equation 5 where k , n , and g , are functions of the flexural moduli D 11 , D 22 , D 12 , and D 66 . Prasad and Shuart (1990) extended Lekhnitskii's (1968) results to the case of an elliptical hole in an orthotropic plate. Here, the solution is sufficiently complex that it is not possible to develop an explicit expression for k b .…”

Section: Introductionmentioning

confidence: 76%

Strain concentrations in notched laminates under bending

Kennedy

Arias

2009

Aircraft Engineering and Aerospace Technology

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PurposeThe purpose of this paper is to determine the validity of using classical laminated plate theory to predict strain concentration factors in notched laminates under bending.Design/methodology/approachThe objective was accomplished by comparing results predicted by classical theory to those from more refined theories that incorporate transverse shear and other 3D effects in the analysis. Three notch sizes and two laminate types were considered. The results were obtained through finite element analysis.FindingsStrain concentration factors predicted by the classical theory were generally found to be significantly lower than those predicted by the more refined theories. However, these differences tended to be very localized to the vicinity of the notch tip.Originality/valueThis study points out a potential deficiency in a commonly used design tool. The seriousness of this deficiency can best be determined by further research, particularly through a systematic testing program.

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Section: Introductionmentioning

confidence: 76%

Strain concentrations in notched laminates under bending

Kennedy

Arias

2009

Aircraft Engineering and Aerospace Technology

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“…Kong and Cheung (1995) proposed a displacement-based, three-dimensional finite element scheme for analysing thick laminated plates by treating the plate as a three-dimensional inhomogeneous anisotropic elastic body. Prasad and Shuart (1990) presented a closed form solution for the moment distributions around holes in symmetric laminates subjected to bending moments. Ukadgaonker and Rao (2000) gave a general solution for bending of symmetric laminates with holes.…”

Section: Introductionmentioning

confidence: 99%

Effect of ellipse orientation on the thermoelastic behaviour of skew laminated composite plate with elliptical cutout

et al. 2009

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An effort is made to study the thermoelastic behaviour of a cross-ply laminated composite skew plate with elliptical cutout subjected to pressure and non-linearly varying temperature loading in the present analysis. Orientation of the elliptical cut out is varied from 0° to 180° with respect to horizontal at an interval of 30° in the anti clockwise direction is considered for the present analysis. A three-dimensional heat conduction analysis in fibre reinforced composite laminates has been simulated by finite element method to get realistic temperature in the laminate under different thermal boundary conditions. A finite element method, which works on the basis of three-dimensional theory of elasticity, is employed to evaluate the stresses and deformations. The effect of orientation due to pressure loading on the stresses and transverse deflection is observed to be insignificant. The magnitudes of the in-plane normal stresses, σ x and σ y , for temperature loading are greatly affected by ellipse orientation and are observed to be minimum at the ellipse orientation of 0° and 90°, respectively. The in-plane and inter-laminar shear stresses are observed to be minimum at the ellipse orientation of 90°.

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Hygrothermal bending of laminated composite plates with a cutout

Ram

Sinha

1992

Computers & Structures

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Moment distributions around holes in symmetric composite laminates subjected to bending moments

Cited by 11 publications

References 14 publications

Strain concentrations in notched laminates under bending

Strain concentrations in notched laminates under bending

Effect of ellipse orientation on the thermoelastic behaviour of skew laminated composite plate with elliptical cutout

Hygrothermal bending of laminated composite plates with a cutout

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